Title :
An RF Circuit for Overhauser Magnetometer Excitation
Author :
Jiaoni, Wang ; Qianwei, Zhou ; Shuang, Zhang
Author_Institution :
Coll. of Electron. Sci. & Eng., Jilin Univ., Changchun, China
Abstract :
Overhauser magnetometer is a device for magetostatic field measurement, RF excitation is necessary for nitrogen oxygen free radical solution. In this paper, design methods coupled with simulations of a RF circuits used in Overhauser magnetometer are presented. Functionally, a RF circuit consists of three parts, namely RF signal source, RF power amplifier and the load. Generation of a 70MHz RF signal will be described. Power amplification aimed to acquire the gain of 13-16dB will be presented. Finally we get a continuous sine wave of 70MHz, 4-5W. We have validated that a linear polarization magnetic field is successfully generated inside the birdcage coil which meets the requirements of the Overhauser magnetometer. In this paper a number of conclusions are based on RF circuit simulation software ADS.
Keywords :
Overhauser effect; coils; magnetic field measurement; magnetometers; polarisation; power amplifiers; RF circuit simulation software ADS; RF excitation; RF power amplifier; RF signal source; birdcage coil; frequency 70 MHz; gain 13 dB to 16 dB; linear polarization magnetic field; magnetostatic field measurement; nitrogen oxygen free radical solution; overhauser magnetometer excitation; power 4 W to 5 W; Coils; Integrated circuit modeling; Magnetic circuits; Magnetometers; RF signals; RLC circuits; Radio frequency; Overhauser magnetometer; birdcage coil; excitation; radio frequency (RF);
Conference_Titel :
Industrial Control and Electronics Engineering (ICICEE), 2012 International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-1450-3
DOI :
10.1109/ICICEE.2012.137
